I like how easy this software is compared what other companies have - not so difficult as some others out there! Honestly though? The UI could be more user friendly but once you get used too its fine & simple enought (I use version 5).
It does work great when using your own servers or if they are hosting them themselves which many do nowadays because we all know cloud has become main stream business wise now days!! So really nothing much here just make sure u check everything before deciding whether ur going t need their service/support etc otherwise i wud recommend goin wit yur current provider cause honestly who wouldnt want those extra features at no additional cost?!